Internal-combustion engine.



I PATENTED FEB. 14, 1905.

G. B. STERNB & S. J. DAVIS. INTERNAL COMBUSTION ENGINE.

APPLIUATION FILED MAY 7. 1901.

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: J7, MNTO/QS W TTO/PNEYA I PATENTED FEB. 14, 1905 G. E. STERNE & S. J. DAVIS. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 7, 1901.

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9 YPW ATTORNEY$ VEN No. 782,471; I PATENTED FEB. 14, 1-905.

0. 1:. STBRNE & s. J. DAVIS.

v INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 1, 1901.

3 SHEETS-SHEET 2 Fig. XV.

INVENTORS V E'gXl/f.

WITNESSES UNITED STATES 1 Patented February 14, 1905. PATENT OFFICE.

DAVIS. SAN DIEGO, CALIFORNIA,

CHARLES E. STERNE AND SAMUEL J.

ASSIGNORS TO STERNE BROS. CO., OF SAN DIEGO, CALIFORNIA, A COR- PORATION OF CALIFORNIA.

SPECIFICATION forming part of Letters Patent N0. 782,471, dated. February 14, 1905.

' Application filed May 7,1901. Serial No. 59,165.

To all whom it may concern.-

Be it known that we, CHA LES E. STERNE and SAMUEL J. DAVIs, citizens of the United States, residing at San Diego, in the county of San Diego and State of California, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is;a specification.

Some of the objects of our invention are, first, to provide means whereby any variation of speed upon thepart of the engine will immediately produce a corresponding variation in the quantity and the richness of the explosive mixture which is fed to the cylinder; second, to accomplish this by extremely simple, compact, and economical means; third, to provide for an accurate adjustment of the governing devices for the purpose of regulating the speed of the engine under any given load and with any quality or character of the fuel employed.

In carrying out our invention we arrange the mixing-chamber almost wholly inside the body of the engine-cylinder in order that the greatest proportion of the charge of the explosive mixture for any working impulse of the engine will be produced at the time said charge is being admitted to the cylinder that is to say, we are thus enabled to bring the, vaporizer-valve extremely close to the inletvalve, thus reducing to a minimum the storage'capacity of the passage between the vaporizer and inlet valve.

Another object of our invention is to so construct the feed mechanism that the same can be applied to and removed from the cylinder with the greatest possible ease, and there is practically no liability of any of the parts getting out of order. Wealso obviate the necessity of the use of inlet-pipes and provide for ready and easy repair.

Another object of our invention is to so construct the parts that they can be easily manufactured and assembled.

Another object of our invention is to avoid liability of interference in the operation by clogging of the fuel-supply passages or valves. I

place.

,shown in. mid-section.

Our invention includes the apparatus,'comclaimed;

The accompanying drawings illustrate our invention.

Figure I is a side elevation of an engine embodying our invention. Portions of the engine are broken away to contract the view. Fig. II is a plan of the inner section of the case of the mixing-chamber. Fig. III is a detached plan of the spring-retainer, which in practice is fastened on the stem of the inletvalve. Fig. IV is a plan of the multipleported partition between the outer and inner compartments of the mixing-chamber. Fig. V is a plan of the multiple-ported governor- 'valve for regulating the passage through the multiple-ported partition shown in Fig. IV. Fig. VI is an elevation looking at the left edge of Fig..V. Fig. VII is an elevation showing the edges of the cap for the outer compartment of the miXing-chamberand the slide for regulating the multiple ports of said cap. The thumbnut for the stud of the valve slide is omitted.

Fig. VIII is a plan of the same, the thumb-nut being omitted. Fig. IX is an elevationfrom the binations, and parts hereinafter described and left of Fig. VIII, the thumb-nutbeing in place.

Fig. X is a plan of the auxiliary air-regulating valve or slide. Fig. XI is a plan, on a larger scale, of the feeding appliance in place on the cylinder, a fragment of which is shown. The ball-governor shown in Fig. I and its con. nection with the valves are omitted. Dotted lines indicate internal structure. Fig. XII is aside elevation of the feeding appliance shown in Fig. XI. Parts are broken away for clearness of illustration. Fig. XIIIris an elevation of the open-ended boX of the, mixingchamber, with the vaporizer-valve and its bushing and spring in place. The fuel-valve is also shown in position with packing-nut in The connection for the fuel-pipe is shown in section. The yaporizer-valve is also Fig. XIV is a plan section on line XVI XIV, Figs. XIII and XV. Fig. XV is a section on line XV XV, Figs. XIII and XIV, looking 1 right. Fig.

XVI is adetail view showing in axial section the mixing-chamber, excepting that the upper and lower walls of the mixing-chamber box are sectioned in a plane which extends through the axis of the vaporizer-valve. The vaporizer-valve and its spring are shown intact, and the inlet-valve is shown intact, with its spring and spring-retainer in axial section. A fragment of the cylinder is shown with the tubular section of the vaporizer-chamber case seated therein.

(4 indicates the engine-cylinder.

6 indicates in a general way the operative parts of the engine.

0 indicates thegovernor connected with said parts by the cam-shaft d.

6 indicates the exhaust valve, and f the sparking mechanism. I g indicates in a general way the feeding appliance.

This invention relates more particularly to the feeding appliance and its connection with the governor.

This internal combustion engine is furnished with a'mixing-chamber consisting of two compartments 1 2, a fuel and air passage 3, leading into the mixing-chamber, an auxiliary air-passage 4, leading into the mixingchamber, and a mixture-inlet 5, leading. from the mixing-chamber into the engine-cylinder (0.

6 indicates a check-valve to control the fuel and air passage 3. 4

7 indicates the inlet-valve to control the mixture-inlet between the mixing-chamber and the cylinder.

8 indicates adjustable means for regulating the auxiliary air-inlet. Such means preferably consist in a slide-valve, as shown, and the auxiliary air-passage 4 is preferably multiple-ported, and the slide-valve 8 is also multiple-ported to correspond to the auxiliary airpassage, so that a very slight movementof the slide-valve will greatly enlarge or diminish the passage. 9 indicates a partition in the mixing-chamber between the fuel and air passage 3 and the auxiliary air-passage 4 on the one side .and the mixture-inlet 5 on the other side, a multiple-ported passage 10 being provided through said partition between the outer and inner compartments 1 and 2 of the mixing-chamber. The multiple ports of said passage 10 are elongated slots which extend across the path of the valve, so that a very slight movement of the valve will give a large variation in the size of the passage. 1 1 indicates adjustable means for regulating the multipleported passage of the partition. Preferably the adjustable means 11 consists in a multipleported slide-valve to correspond to the multiple-ported partition 9, so that a slight movement of the slide-valve will greatly enlarge or diminish the passage 10. Suitable means are preferably provided for connecting the governor c with both of'said, passage-regulating means for the purpose of simultaneously enlarging the auxiliary air-passage 4 and diminishing the partition-passage10 when the governor speeds up, and vice versa when the governor slows down. The object of this is to simultaneously increase the capacity of the auxiliary air-passage and decrease the capacity of the partition-passage when the engine is running at too high speed, so that a less amount of the fuel mixture will pass through the partition-passage and a greater amount of air will pass through the auxiliary air-passage, .thereby simultaneously rarefying the mixture drawn into the cylinder from the compartment 2 of the mixing-chamber and diluting the mixture formed in the compartment 1 of the mixing-chamber.

It is to be understood that in practical operation at the intaking stroke of the engine the atmospheric pressure is. allowed to raise the check-valve 6 to allow the air to pass through the passage 3 and at the same time allowing the fuel oil or gas. as the case may be, to flow into the passage 3, to be thence carried into the compartmentl by the inrush of air through the passage 3. If the auxiliary air-passage 4 is open whenthe charge is being sucked into the cylinder through the inlet 5, atmospheric air will flow through the auxiliary air-passage 4 to dilute the mixture in the mixing-chamber. The amount of air which will thus enter the mixing-chamber at the impulse of the engine will be regulated by enlarging and diminishing such passage 4, and the extent to which the valve 6 is lifted by atmospheric pressure will be modified by the freedom with which the air enters through the auxiliary air-passage. If such passage is widely opened,the supply of air will be more largely taken through the auxiliary air=passage, and the inrush of air through the vaporizer-passage 3 will be reduced to a minimum, while, on the other hand, if the auxiliary passage4 is nearly or completely closed the inrush of air through the vaporizer-passage 3 will be increased to a maximum. Consequently the richness of the mixture is directly affected by enlarging or closing the auxiliary air-passage. Furthermore, when the mixture-passage 10 of the partition 9 is fully open the suction of the piston (not shown) will produce a more rapid rarefaction of the contents of the compartment 1, thereby inducing the inflow of a large volume of atmospheric air, so that the action of the air upon the vaporizer-valve to lift it will be at its maximum and said valve will be lifted so as to allow a maximum amount of air to flow through said passage, andwhen the area of the passage 10 is brought to a minimum the suction of the engine will produce a minimum rarefaction of the mixture in compartment 1 and a maximum rarefaction of the mixture in compartment 2, so that the mixture which flows into the cylinder will be rare and the inflow of air into compartment 1 auxiliary supply directly and the fuel and air supply indirectly by the variation in suction effect without the necessity of a cooperating slide-valve for the fuel-supply, is an impor-' tant and valuable feature of our invention. Not only is the mechanism thereby simplified, but the automatic coregulation or relative adjustment of the auxiliary air-supply and the fuel-supply is rendered more perfect than can be effected with any system of intercon nected valves. valve for-the'fuel and air passage responds to the variation in suction in'duced by the auxiliary valve, and therefore does not change the above-described relative regulation of the fuel and air supply to the auxiliary air-supply, except that it operates, in addition to such regulation, to restrict the fuel and air supply to an extent dependent on the adjustment of its spring-pressure device. This check-valve, inasmuch as it moves directly to and from its seat, is not liable to be clogged or jammed by deposits from the fuel, as would occur with a slide-valve. A further advantage of the above-described means of regulation is that increase of fuel and air supply is accompanied by increased velocity of the fuel and air current through the supply-passage, and such increased velocity enables a given volume of such supply to entrain or take up a greater amount of fuel, particularly when the fuelpassage opens directly into the valve-seat, as shown. The advantage of having the fuelinlet so located is partly that the air-current is most rapid at that pointjand therefore most effective for the purpose of vaporizing the oil, and partly because the oil-supply is thereby brought as near as possible to the mixingchamber. The various features of the invention therefore contribute, first, to the supply of the oil and air to the cylinder in the most direct manner possible, with aminirnum of clearance or waste space, and, second, to extremely quick and sensitive regulation, the

regulation being due to four coacting effects.

For example, on an increase of load the governor decreases the auxiliary air-supply, and a corresponding increase of fuel and air supply results. This fuel and air supply comes in richer or with a greater proportion of oil, because of its greater velocity, and its subsequent dilution is less because of the decreased auxiliary air-supply and also because the absolute amount of fuel and air supply is'increased. Thus the supply that The spring-controlled checktion, and the widening of the inlet-passage to the engine gives a fourth regulating effect. This sensitive regulation is, moreover, not wholly dependent on the regulating movement of the auxiliary air-valve, but may, if such air-valve be fixed or adjusted in stationary position, be effected by the regulating movement of the inlet-valve 11. Assuming the auxiliary air-valve to have been set at a given position to give a definite port-opening and that the port area opened by valve 11 is much greater than such definite area, then each s' uction from the cylinder will cause, as above stated, a considerable rarefaction of the mixture and a correspondingly great suction through the air-passage. For the reasons above stated this Wlll result'in a relatively .rich mixture, as Well as a large volume admitted; but if the valve '11 be regulated by the action of the governor to-give asmaller portopening-for example, about equal tothe defi nite port area of the auxiliary airvalve then the air-supply for the mixture, following the course of least resistance, will practically all come through the auxiliary air-valve and relatively little will come through the fuel and air passage. This, for the reason above stated, will result in a relatively poor mixture, as well as a smaller quantity of it. Thus the presence of the auxiliary air-valve has a controlling efiect onthe cooperation of the inletvalve 11 and the fuel and air check-valve, rendering the regulating action of theinlet-valVe 11 much more effective and sensitive. Moreover, by manual adjustment of this auxiliary air-valve by means of its fastening device 13 in the proper fixed position the regulating function of the moving valve 11 may be adjusted without manipulation of moving parts While the engine is running. I

In order that a very slight movement of the slide-valves 8 and 11 .shall produce a great variation in the delivery of atmospheric air and of the explosive mixture, said slide-valves and their bearings 0 and 9, respectively, are multiple-ported;

In order to enable the attendant to set the engine for a given speed with a given character of fuel, the auxiliary air slide-valve isfurnished with one or more set-screws or thumbnuts to make suitable adjustable connections. In the drawings, 12 indicates a thumb-nut on a set-screw 13 to adjust and fasten the auxiliary slide-valve 8 with relation to the case of the mixer-chamber when it is not desired to operate the auxiliary air-valve'8 with the governor. Provision is made whereby the attendant may cause the valve 8 to be operated by the governor.

14 indicates a thumb-nut on a screw 15, which passes through a slot 16 in a projection 17 of the auxiliary slide-valve 8 for ad justably connecting said slide-valve with the post 18, which is permanently fastened to the projection 19 of the governor-valve 11, which con- IIO IIS

, trols the mixture-passage between the compartments 1 and 2 of the mixing-chamber.

' indicates a bent lever, which is operated by the governor c in the ordinary way to operate the post 18 and move the slide 11 and also the auxiliary slide-valve 8 when the connection is made between the post 18 and said auxiliary slide.

In Figs. XI and XII, 21 indicates a link which carries the screw 15 and which is furnished with a slot 22 for a set-screw 23, by which the link 21 is adjustably fastened to the post 18, thus giving a wide range of ad-' justment between the mixture slide-valve 11 and the auxiliary slide-valve 8.

For compactness the cylinder at of the engine is furnished with a cylindrical seat It, extending from the outside to the inside of the cylinder, but being of smaller size at the inner tion 9 is fitted on the outer end of said case z',

thus forming between the valve 7 and the partition the compartment 2 of the mixing:

chamber. The outer compartment 1 is inclosed by an open-ended box n, having one open end fitted on said partition and a cap 0 to close the other end of said box. The cap is provided with the auxiliary air-passage 4.

9 indicates studs which pass through the cap, the open-ended box, the partition, and the flange k of the case 2' and screw into the boss m of the cylinder, thus firmly holding the appliance in place.

The inlet-valve 7 normally closes the inner end of the mixing-chamber case in the ordinary manner.

The tubular case i is furnished between its ends with a guide (1 for the valve-stem 9". This guide also forms a support for the spring 8 to hold the valve 7 normally closed. The stem 9 of the inlet-valve plays through said guide and is of smaller diameter at its outer portion and has a screw-threaded section t between its ends. and inside the compartment 2.

u indicates a springretainer screwed on the screw-threaded section It and against the spring 8.

-v indicates a set-nut for holding the springretainer in place.

The cap 0 of the vaporizing-box n has a guide w for the outer reduced end as of the stem 1 The open-ended box at comprises four walls, one of which, 43, is perforated, as indicated at 24, for the admission of air and is furnished with a guide 25 for the lower end of the valvestem 26 of the vaporizer-valve 6. The opposite wall 27 has a passage 28 for the valvestem 26. 29 indicates a bushing screwed into said passage 28 and forming a guide for the outer: end of the valve-stem 26.

30 indicates a closed partition across the box between the walls 43 and 27 and furnished with a passage 3, formed with the valve-seat for the valve 6. Said partition has a passage 31 for the fuelinlet opening into said valve-seat, said partition 30 being between said guide 25 and said valve-stem passage 28 and extending alongside the perforated wall 43.

j 32 indicates a spring around the vaporizervalve stem 26 to throw the valve and hold it normally seated. The bushing 29 presses upon the spring to-give it the proper tension.

33 indicates the fuel-valve; 34, the fuelpipe.

35 indicates the packing-nut for the fuelvalve.

36 indicates wire-netting over the ports through which the air enters the outer compartment 1 of the mixing-chamber to prevent the ingress of floating material and also to prevent any backflashing or-escape of flame through said ports. This feature is of especial value in this engine on account of the absence of any pipes or long passages between the combustion-chamber and the external air.

In the process of manufacture the valveseat 3 can be readily reamed by inserting a mandrel through the opening 28 and applying the-reamer to said mandrel after it is inserted. When the box n is finished, the spring 32 will be applied to the stem of the vaporizer-valve, andsuch stem will be passed outward from the inside of the box n through the opening 28, and the valve 6 will then be seated in its seat 3, and the lower end of valve-stem 26 will be seated in its guide 25. Then the bushing 29 will be passed over the end of the valve-stem 26 and will be screwed into place in the opening 28, and against the spring 32. Then the stem of the inlet-valve will be passed through the guide q therefor and will be brought through its seat and the spring 8 will be placed in position. (Shown in Fig. XVI.) The spring-retainer u will then be screwed into place and secured by the set-nut 0. Then ICC the tubular section 2' of the case will be inserted into the seat h. Then the partition 9 will be put in place and the slide-valve 11 will be adjusted in place. Then the outer case or box a will be brought into position, after which the slide-valve 8 will be adjusted and the cap 0 brought into place. Then the studs 0 will be inserted through the cap 0, box a, partition 9, and flange 7c and will be screwed into the boss m of the cylinder a.

37 and 38 indicate ways on the opposite sides of the box or casing n to guide the projecting arms 17 and 47 and 19 and 49 of the slide-valves 8 and 11, respectively.

What we claim, and desire to secure by Letters Patent of the United States, is

1. An internal-combustion engine furnished with a mixing-chamber, a fuel and air passage ,leading into the mixing chamber, an auxiliary air-passage leading into the mixing-chamber the one side, and the mixture-inlet passage on the other side; a passage being provided through said partition; a check-valve to control the air and fuel passage; a check-valve to I control the mixture-inlet, a valve for regulat ing the auxiliary air-passage; a valve for regulating the passage through the partition; and a governor driven by the operative parts of the engine and connected to operate said valves reversely for the purpose of simultaneously enlarging the auxiliary airpassage, and diminishing the partition-passage when the governor speeds up, and vice versa when the governor slows down. a

3. An internal-combustion engine furnished with a mixing-chamber, afuel and air passage leading into the mixing-chamber, and a mix ture-inlet leading from the mixing-chamber into the engine-cylinder; a partition in the mixing-chamber between the fuel and air passage and the auxiliary air-passage on the one side and the mixture-inlet on the other side;

- a passage being provided through said parti 4 tion; a check-valve to control the fuel and air passage; a check-valve tocontrol the mixtureinlet; a slide-valve for regulating the auxiliary air-passage; a slide-valve for regulating the passage through the partition; and a governor driven by the operative parts of the engine connected .to operate said slide-valves reversely for the purpose of simultaneously enlarging the auxiliary air-passage and diminish ing the partition-passages when the governor speeds up, and vice versa when the governor slows down.

4;. An internal-combustion engine furnished with a mixlng-chamber, a fuel and air passage leading into the mixing-chamber, an auxiliary air-passage leading into the mixing-chamber,

and a mixture-inlet leading from the mixing-' chamber into the engine-cylinder; a partition in the mixing-chamber between the fuel and control the passage through the partition, and

governor means on the engine controlling said engine-operated valve.

5. An internal-combustion engine furnished with a mixing-chamber, a fuel and air passage leading into the mixing-chamber, an auxiliary air-passage leading into the mixing-chamber, and amixture-inlet leading from the mixingchamber into the engine-cylinder; apartition in the mixing-chamber between the fuel and air passage and the auxiliary air-passage on the one side, and the mixture-inlet passage on the other side; a passage being provided through said partition; a check-valve to control the fuel and air passage; a cheek-valve to eo'ntrol the mixture-inlet; adjustable means for regulating the passage through the partition; a governor driven by the operative parts of the engine; and means connecting the governor with the partition-passage-regulating Vmeans. i p 6. An internal-combustion engine furnished with a mixing-chamber, a fuel and air passage leading into the mixing-chamber, an auxiliary air-passage leading into the mixing-chamber, and a mixture-inlet leading from the mixingchamber into the engine-cylinder; apartition in the mixing-chamber between the fuel and air passage and the auxiliary air-passage on the one side, and the mixture-inlet passage on the other side; apassage being provided through said partition; a check-valve to control the fuel and air passage; a valve to control the mixture-inlet, a valve for regulating the passage through the partition;a valve for regulating the auxiliary air-passage, a governor driven by the operative parts of the engine and connected to reversely operate the valves in the partition-passage and the auxiliary air-passage, and means for adjustment of the connection to one of said valves. i

7. In an internal-combustion engine, the combination of a cylinder furnished with a seat extending from the outside to the inside of the cylinder; an open-ended mixing-chamber case fitted in said seat and furnished atits inner end with an inlet-valve seat; a partition fitted to the outer end of said case; an openended. box having one open end fitted on said partition; a cap for closing the other end of said box, said partition being provided with a passage and said cap being provided with a passage; means fastening the cap, box and case to the cylinder; a valve-seat in said box; a check-valve for said valve-seat; an air-passage and a fuel-passage being provided in said box to supply air and fuel to the box through said valve-seat, said check-valve being arranged to normally close said fuel and air' passage; a slide-valve for regulating the passage through the partition; a slide-valve for regulating the passage through the cap; and an inlet-valve in the inlet-valve seat for normally closing the inner end of the mixing-chamber case.

8. In an internal-combustion engine, a mix ing-chamber case comprising a tubular mem- IIO her extending inside the-engine-cylinderand its outer end with a flange to fiton the cylin.

der of the engine, and at its inner end with a valve-seat, and between the said ends a guide for the valve-stem and a support for the valve-spring; said mixing-chamber case also comprising an outer member, composed of'an open-ended box secured with its open end toward the tubular member, and fuel and air valves provided in said case. I

9. In an internal-combustion engine, the combination set forth of the tubular section of the mixing-chamber case furnished at one end with a valve-seat and at the other end with a flange to fit on the engine-cylinder, and between the ends with a spring-support and a guide for the inlet-valve stem; an inlet-valve seated in said seat and furnished with a stem playing through said guide, and being of smaller diameter at its outer portion, and having a screw-threaded section between its ends; a spring seated on said seat; a spring-retainer screwed on the screw-threaded section and against the spring; and a vaporizing-box furnished with a cap having a guide for the smaller portion of said stem, and fuel and air supply valves connected to and supported by said box.

10. The open-ended box set forth for the mixer of an internal-combustion engine, comprising four walls, one of which is perforated for the admission of air and is furnished with a guide for the end of a valve-stem, and the opposite wall having a passage for the valvestem; a partition across the box along between said last-named walls and furnished with a passage formed with a valve-seat; and a fuelinlet opening into said valve-seat, said parti tion being between said guide and said valvestem passage. I

11. The combination of the open-ended box furnished with four walls, one of which is perforated for the admission of air, and is furnished with a valve-stem guide, and the opposite wall having a passage for a valve-stem; said box being furnished with a partition extending alongside the perforated wall and having a passage therethrough provided with a valve-seat and with an inlet-passage opening into said valve-seat; avalve seated in the valveseat and furnished with a stem on its opposite sides to play in the guide and through the valve-stem passage; a spring around said stem to throw the valve; anda bushing around the means on the engine controlling said engineoperated means, a suction-passage for fuel air alone, a check-valve in the fuel and air passage provided with a seat into which the fuel-supply leads, and a positively-operated valve for the auxiliary air-supply controlling the fuel-supply wholly by regulation of the suction in the fuel and air passage.

13. In an internal-combustion engine, the combination of a mixing-chamber having a passage to the engine-cylinder, engine-operated means controllingsaid passage, governor means on the engines controlling said engine-operated means, a suction-passage for fuel and air and an auxiliary suction-passage for air alone, a check-valve in the fuel and air passage provided with a seat into which the fuel-supply leads, and a positively-operated valve for the auxiliary air-supply controlling the fuel-supply wholly by regulation of the suction in the fuel and air passage.

14. A carbureter for explosive-engines comprising a double-compartment mixing-chamher, one of which compartments is provided with an inlet to the engine-cylinder and the other one is provided with an inlet to the engine-cylinder and with a fuel and air inlet and an auxiliary air-inlet, and means for controlling said passage and said fuel and air and auxiliary air inlets independently of each other, the controlling means for the passage between the compartments being connected to be driven by the engine, so as to be positively operated, governor means on the en gine regulating the said controlling means for the passage between the compartments, the controlling means for the fuel and air inlet being operated by suction, and that for the auxiliary air-inlet being manually operated.

. 15. In an explosive-engine, a cylinder provided with a seat extending to the interior thereof, an open-ended case in said seat having a valved inlet at its inner end, a box-like compartment at its outer end and communieating therewith, said compartment being provided with a valved air and fuel inlet and having two of its opposite walls multipleported, a multiple-ported valve for each of said walls, and means for operating said valves.

independently of each other.

16. In an explosive-engine, a cylinder provided with a seat extending to the interior thereof, an open-ended case in said seat havbox-like compartment secured to said flange,

IIS

and means for supplying said compartment and chamber with air and fuel.

18. In an internal-combustion engine, the combination of a mixing-chamber having a passage to the engine-cylinder, a fuel and air supply and an auxiliary air passage, a checkvalve in the fuel and air passage, reverselyoperating slide-valves in the passage to the engine and in the auxiliary air-passage, and governor means operating the said slide-valves.

19. In an internal-combustion engine, the combination of a mixing-chamber having a passage to the engine-cylinder, and a slidevalve controlling said passage, said chamber also having a fuel and air inlet provided with a check-valve, and an auxiliary air-inlet provided with a slide-valve, and governor means reversely controlling the said slide-valves.

In testimony whereof I have signed my name to this specification, at Los Angeles, California, this26th day of April, 1901, in the pres- I ence oftwo subscribing witnesses.

CHARLES E. STERNE.

In presence of- JAMES .R. TOWNSEND, JULIA TOWNSEND.

In testimony whereof I have signed my name to this specification, at San Diego, California, this 30thday of April, 1901, in the presence of two subscribing witnesses. l

SAMUEL J. DAVIS. In presence of W. R. GUY, CLARKE W. MoKEE. 

